Is it better than a touchpad? My iPad with touch does rotating and zooming really well. I can see this being an awesome technology in an operating room where t

Is it better than a touchpad? My iPad with touch does rotating and zooming really well. I can see this being an awesome technology in an operating room where they don't want to touch things for sanitation reasons. I have a hard time imagining how it is useful in my day to day use of a computer.